Arsenal and Chelsea will both be looking to maintain their unbeaten starts to the Champions League campaign on Wednesday night.
Arsenal, who have endured a poor start to the Barclays Premier League season, have been slightly more impressive in Europe, and have claimed four points from their opening two Group F games, after claiming a draw at Borussia Dortmund, before beating Olympiacos at home.
However, a stern test awaits them at the Stade Velodrome on Tuesday when they visit group leaders Marseille, who have won their opening two matches.
Olympiacos host Borussia Dortmund in Group F's other game.